Great Britain 1817 George III Excellent Superb High Grade Silver COIN HALFCROWN27 Jun, 2023 in great tagged britain / coin / excellent / george / grade / great / halfcrown / high / silver / superb by admin Great Britain 1817 George III Excellent Superb High Grade Silver COIN HALFCROWN. The coin is preserved in Quadrum Intercept Capsule as to be protected from tarnish for years.